News To YouThe place where wonderful, funny, and amazing things exist. This blog delivers news in the easiest way of editors' choice.

Patti Solis Doyle announced that she is stepping down as the campaign manager for the presidential campaign of Sen. Hilary Clinton, D-N.Y., ABC News has learned that this afternoon.

In a note she sent to her staff, Solis Doyle announced that this week Maggie Williams, Clinton's chief of staff when she was first lady, "will begin to assume the duties of campaign manager." Solis Doyle, 42, said she would remain as a senior adviser to the campaign.

Solis Doyle, who has been with Clinton she was first lady of Arkansas, noted that "this has already been the longest Presidential campaign in the history of our nation, and one that has required enormous sacrifices from all of us and our families."

She wrote that she has been "proud to manage this campaign, and prouder still to call Hillary my friend for more than sixteen years. I know that she will make a great President."

The announcement came one day after Clinton's opponent, Sen. Barack Obama, D-Ill., swept four primary contests -- Nebraska, Washington state, Louisiana and the U.S. Virgin Islands -- and two days before the so-called "Potomac Primary" of Virginia, Maryland, and Washington, D.C., where Clinton's campaign says they do not expect her to fare well.

Below was her letter wrote prior the announcement :

Over a year ago Hillary launched her campaign for President.

Her announcement began a historic effort that has inspired millions and brought hundreds of thousands to their feet all across this nation.

I have been proud to manage this campaign, and prouder still to call Hillary my friend for more than sixteen years. I know that she will make a great President.

This has already been the longest Presidential campaign in the history of our nation, and one that has required enormous sacrifices from all of us and our families.

During the last month I have been working closely with my longtime friend, Maggie Williams.

This week Maggie will begin to assume the duties of campaign manager. I will serve as a senior adviser to Hillary and the campaign and travel with Hillary from time to time on the road. Maggie is a remarkable person and I am confident that she will do a fabulous job.

Although I will continue to see you all at headquarters, I would be remiss if I didn't thank each of you for your dedication, excellence, and passion over the last year.

You are the best campaign staff in the history of Presidential politics and I am grateful to each of you for your hard work and friendship.